Throttle-valve.



No. 7|7,292. Patented Dec. 30, |902.

C.' SHAWVER.

THROTTLE VA'LVE.`

(Application led July 14, 1902.) (No Model.)

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CHARLES I. SHAVVER, OF SPRINGFIELD, OHIO, ASSIGNOR TO AUGUSTUS B. NOLTE,OF SPRINGFIELD, OHIO.

TH ROTTLE-aVALVE.

SPECIFICATION forming lpart Vof Letters PatentNo. 717,292, datedDecember 30, 1902. Application lecl July 14, 1902. Serial No. 115,3 97.(No model.)

xo This invention relates to throttle-valves for automobiles, it being,however, capableofuse in other connections, and has for its object. toprovide a construction whereby the disadvantages attendant upon suchvalves as I usually constructed may be avoided.

To this end my invention consists in cer` tain novel features which Iwill now proceed to describe and will then particularly` point out inthe claims.

an elevation of a valve embodying my invention in one form. Fig. 2 is asectional view of the same, taken on the line fr .fr ofV Fig. 1 andlooking in the direction of the arrows; and Fig. 3 is a transversesectional view taken on the line y y of Fig. 2 and looking in thedirection of the arrows.

In the said drawings,l indicates thebody or casing of the valve, whichis provided with an inlet-passage 2, a valve-chamber 3, and asteam-outlet opening 4c, by means of which it is connected with theengine. Preferably the casing contains a steam-chamber 5,with which theopening 4c communicates directly, while the valve-chamber communicateswith said steam-chamber by means of a sleeve 6,which lies Within thecasing 2 and has an internal bore or opening 7, closed' at one end by ahead 8 and opening at the other end into the valve-chamber. Apertures 9,formed through the wall of the sleeve 6, establish communication betweenits interior and the interior of the steamchamber. The head 8 fitswithin the end of the casing 1 and is held in position by a cap-nut10,which screws over the end of the casing 1 and hasa top flange 11,between which and the end of the casing l a packing or gasket 12 isinterposed, this packing or gasket also extending over the outer end ofthe head 8 of the sleeve 6. At

its other end the. sleeve abuts against the In the accompanyingdrawings, Figure 1 isV margin of theend of the valve-chamber, asindicated at 13, the parts being tightly united, preferably by a groundjoint, at this point. The sleeve is provided at its end adjacent to thevalve-chamber with a valve-seat 14.

The valve as a whole is indicated by the reference-numeral 15 and iscomposed of a body or valve proper, 16, and an extension 17 in the formof ahollow cylinder or sleeve having apertures 18 therein through itswall.

The valve-chamber 3 is of greater diameter than the inlet-passage 2,andthe valve proper, 16, is of less diameter than the valve-chamber 3,while the valve extension 17 fits tightly within the inlet-passage 2.The shoulder 19,

between the inlet-passage 2 and valve-chainber3,'forms a seat againstwhich one face of lthe valve proper, 16, fits with a tight lit, the

joint being preferably' ground. The other -face of the valve proper, 16,is adapted to fit it may be connected with the steam-supply,

said coupling being held to the casing by a clamping-nut 25, or thesteam-supplymay be suitably connected to the casing 1 atits receivingend in any other suitable manner. The casing may also be provided with athreaded nipple 26 to receive a lubricating device or connection bymeans of which a lubricant may be introduced into the steam-chamber 5 tolubricate the valve and cylinder.

It will be noted that the valve-chamber is of such length relatively tothe valve and its extension that when the latter are drawn inward intothe valve-chamber 3 to such an eX- tent that the apertures 1S havepassed clear of the shoulder 19 and are admitting the maximum amount ofsteam the body 16`of the valve is sufficiently far from the seat let topermit an unrestricted ilow of the steam thus admitted out of thevalve-chamber into the interior of the sleeve 6 and thence to the IOOengineport 4, said steam passing freely around the body of the valve 16,between it and the wall of the valve-chamber 3, the difference indiameter between the valve body andchamber being sufficient for thispurpose.

' It will also be noted that the opening 27 in the larger end of thecasing 1, in which the head 8 of the sleeve 6 fits, is of greaterdiameter than any portion of the sleeve lying inward from said head andalso of greater diameter than any part of the valve, so that byunscrewing the nut 11 the sleeve 6 and the entire valve 15 may bereadily removed. The parts may obviously be as readily replaced whendesired.

Heretofore in throttle-valves of this character it has been customary toemploy avalve similar to the body portion 16 of my improved valve, andthe steam has been shut o and regulated by the relative position of saidvalve and the seat 14. With this construction great difficulty has beenfound in regulating the passage of the steam, owing to the fact thatwhen only slight space is left between the Valve and seat the steam iswiredrawn, and there is a constant tendency for the valve to eitherclose entirely or to fly open to its full extent. The application oflocking devices to the throttle-lever for remedying this difficulty isineffective, because it interferes with nicety of regulation and isdifficult to operate. Moreover, the valve and seat cut and wear veryrapidly when the passage between them is restricted, as in closethrottling. By reason of my construction these disadvantages areentirely obviated. While in running position the valve proper, 16, movesfreely in the central part of the chamber without varying the liow ofsteam, and the regulation is entirely effected by the extent to whichthe apertures 18 are projected into the valve chamber beyond theshoulder 19. The valve being practically balanced by the equalization ofpressure on opposite sides thereof Without bringing the valve intoimmediate proximity to its seat, the valve will remain in any positionto which it is moved, and in practice any device capable of producing aslight friction or binding action on the throttle-lever will serve tohold it and the valve in any one of the running positions to which itmay be adjusted. Moreover, since the valve does not approach its seattoo closely when in running position the cutting of the valve and seat,hereinbefore referred to, is obviated. Furthermore, the valve extensionfits snugly within the inlet-passage, so as to form a guide for thevalve,

thereby preventing buckling or bending of the stem and consequentdisplacement of the valve,since the valve and stem are thus guided andsupported at each end of the valve-casing. A still further advantage ofmy construction is `that the valve-chamber is provided at each end. witha seat for the valvebody, so that at either extremity of the motion ofthe valve it is closed and the ow of steam is cut off. This is ofparticular advantage in connection with automobiles, which arefrequently operated by unskilled persons, who are apt to move the valvein the wrong direction in endeavoring to stop in case of emergency. Withthe ordinary valve this simply increases the speed to a maximum, whilewith my improved valve such an error would immediately shut off thesteam, and thereby tend to prevent accidents. It is also obvious that a.great nicety of regulation in the admission of steam may be obtained bymeans of the particular construction which I have devised for thatpurpose.

1 do not wish to be understood as limiting myself strictly to theprecise details hereinbefore described, and shown in the accompanyingdrawings, as it is obvious that these details may be modified withoutdeparting from the principle of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. A throttle-valve comprising a casing having an inlet-passage, avalve-chamber of larger diameter communicating therewith at one end, anda valve-seat at the outlet end of the valve-chamber, in combination witha valve having an imperforate body portion of less diameter than thevalve chamber in whichitis longitudinally movable, adapted to fit theseat at the outlet end thereof and having a hollow cylindrical extensionon its opposite side fitting within the inlet-passage, the wall of saidextension having apertures therethrough, substantially as described.

2. A throttle-valve comprising a casing having an inlet-passage, avalve-chamber of larger diameter communicating therewith at one end, anda valve-seat at each end of the Valve-chamber, in combination with avalve having a body portion of less diameter than the valve-chamber,adapted to t the seats at the ends thereof, and having a hollowcylindrical extension on its inlet side fitting within theinlet-passage, the wall of said extension having apertures therethrough,substantially as described.

3. A throttle-valve comprising a casing having an inlet-passage, avalve-chamber of larger diameter communicating therewith at one end, anda valve-seat at the outlet end of the valve-chamber, in combination witha valve having a body portion of less diameter than the valve-chamber,adapted to lit the seat at the outlet end thereof, and having a IOO IIO

hollow cylindrical extension on its opposite larger diametercommunicating therewith at one end, and a steam-chamber of still largerdiameter adjacent to the valve-chamber and communicating therewith atone end,` said casing being open at its end farthest from the inlet end,in combination with a sleeve having a head to t said last-mentionedopening, and a hollow body extending through the steam-chamber to thevalve-chamber, abutting against the end of the latter, and provided witha valve-seat, said sleeve being provided with lateral openings, and thesteamchamber being provided with anopening connected with the engine, avalve having a body portion of less diameter than the valve-chamber,adapted to fit the seat on the end of the sleeve, and having a hollowcylindrical extension on its opposite side fitting within theinlet-passage, the wall of said extension having apertures therethrough,and a valve-stem extending loosely through the sleeve, said sleeve beingprovided at its outer end with a stuffing-box for said stem, and meansfor detachably connecting the sleeve and casing at the outer end of thelatter, those portions of the sleeve and valve Within the casing beingof less diameter than the opening at the end of the casing,substantially as described.

In testimony whereof I affix my signature in presence oftwo witnesses.

CHARLES I. SHAWVER. Witnesses:

E. O. HAGAN, IRVINE MILLER.

